Auxiliary lock



J. F. GUNDERSON. AUXILIARY LOCK. APPLICATION FILED OCT. 27.1919.

1 ,360,289. Patented NOV. 30, 1920.

2 SHEETS-SHEET l- J. F. GU'N'DERSON.

AUXILIARY LOCK.

APPLICATION men 00?.27. 1919.

1,860,289, Patented Nov. 30, 1920.

2 SHEETS-SHEET 2.

"Eu 2 in? 314mm] for :Iosgphf? fi'lundensa without the JOSEPH F.GUNDERSON, 0F SEATTLE, WASHINGTON.

AUXILIARY LOCK.

Specification of Letters Patent.

Patented Nov. 30, 1920.

Application filed October 27, 1919. Serial No. 333,533.

To all whom it may concern:

Be it known that I, Josnrn F. GUNDEBSON, a citizen of the United States,residing at Seattle, in the county of King and State of lVashin ton,have invented certain new and useful mprovements in Auxiliary Locks; andI do hereby declare the following to be a full, clear, and exactdescription of the invention, such as will enable others skilled in theart to which it appertains to make and use the same.

This invention relates to locks cially to an auxiliary door lock.

It is one of the objects of the present in vention to provide anauxiliary or detachable door lock that can be readily attached to theusual or common form of door lock without in any way materially injuringthe lock or defacing it, or altering the lock mecha nism, or the keysthereof, other than by merely flattening or shaping the entering end ofthe common key so that it will cooperate with the female coupler forminga and espepart of this invention. 25

Another object of this invention is to provide an auxiliary orsupplementary lock with a complementary key, the look when a )pliedserving to prevent the removal of t 1e usual or ordinary key of thepermanent lock in the door.

Again it is an object of this invention to provide a device of thischaracter that is, at

once, simple, substantial, reliable, and that can be quickly applied andand that cannot be readily It is an important object quickly removed,tampered with.

of thls invention to provide an auxiliary lock that can be easilyconnected to the usual or ordinary door lock such as is commonly foundin hotel doors for the purpose of securing the usual key in the lock onthe inside of the door and thus prevent entry into the room applicationof a proper keyto the supplementary or auxiliary lock.

With these and other objects in view as will be rendered manifest fromthe following specification, the invention consists of the construction,the combination and in details and arrangements of the parts as moreparticularly set forth relative to the embodiment of the inventionillustrated in the accompanying drawings.

dherein. Figure 1 is a perspective view of the auxiliary lock as appliedto the outside of the door, the key being removed.

Fig. 2 is an edge elevation of the usual tl'on'of a door D lock andshowing in sectional view the auxiliary lock applied to the outside ofthe est utcheon plate of the lock.

Fig. 3 shows the auxiliary lock in elevation and detached from the door.

Fig. 4 is a side elevation of the fastening bolt with the barrel housingremoved from its casing.

F ig.- 5 is a the housing.

Fig. 6 is a perspective view of the housing. Fig. :7 is a perspectiveview of the box or casing of the auxiliary lock.

Fig. 8 is a perspective view of the inner barrel or cylinder member.

Fig. 9 is a perspective view of the outer cylinder member.

Fig. 10 is a perspective view of the female socket member.

In the embodiment of the invention a plan view of the lock bolt of isprovided with a 100 L of the usual or common form having inside andoutside escutcheon plates S and into which look there may be insertedthe usual and suitable key K, which in the present instance has itsinnerend flattened or made otherwise complementary to fit a socket piece orcoupler 2 having an a erture complementary to the cooperative en of thekey K and also having an aperture 3 at its other end to pass onto and beadjustable along the stem 4 of the inner section of a cylinder 5 whichis rotatably mounted on a housing or barrel 6. The outer face of thecylinder section 5 is provided with a suitable combination device 7 toreceive the complementary end of the key 8 of the auxiliary lock, thiskey being insertible through an aperture formed in the outer face of acasin 10 which overlaps and holds in its cham er the outer section 11 otthe cylinder, and through which the key 8 is insertible to engage thiscomplementary device 7 in the end of the coupler turn,- ing cylindersection 5. r

In order to adapt this lock to doors of different thicknesses, thecoupler 2 is longitudinally adjustable along stem 4 of the cylinder 5and may be fastened at such suitable positions as by means of a setscrewlQ, which when the auxiliary lock structure is applied to the doorwill extend outwardly as shown in Fig. 2. but when the auxiliary lockkey 8 is turned to rotate the coupler 2 through means of the cylindersections and thus turn the key K. the set screw 12 assumes an uppermostposition, and will then also pass up behind the outer escutcheon plate Sand serve to hold the parts in assembled position.

v In orderto secure the auxiliary lock barrel in position, and preventthe removal of any of the parts thereof, except the key 8.

From the door from the outer side thereof,

a a fasteningbolt 15 is provided, and this has on its inner end a nut 16designed to be jammed up against the inner escutcheon plate Sthus'drawing a nut 17 on its outer end up against the flange 6 of thebarrel 6, this flange having an external thread 6* and engagingcomplementary threads formed therefor externally on the shell or casing'10. -It is understood that the flange 6 of the barrel 6 is providedwith an aperture as .at'6 to take the fastening bolt 15, this bolt,passing through an aperture in a locking plate 18, which is inovablyconnected as by .a pivotal device or hinge 19 to one edge, of the flange6, and having at a diametrically opposite point a tongue or lug 20 toenter a notch 21 in the edge of the casing 10, so that after the nut 17has been adjusted to the desired position as shown in Fig. 4, theeasinglO is thenlscrewed onto the threads 6* and the locking plate 18 isclosed against the 'back of the body or barrel 6, the tongue 20 engagingthe notch walls 21, preventing a relative rotation of the casing 10 andbarrel 6. The extending end of the bolt 15 is then inserted into theslot of the keyhole 22, the key K being turned to an oblique positionand the socket or connecting coupler is passed into the round end of thekeyhole and prevents the withdrawal of the key K, by

preventing its return to a vertical position, but'does .not interferewith the revolution of the key sufiiciently to throw or unthrow thebolt.

the bolt of the lock.

From the above it will be seen that after the key K has been altered tothe slight degree necessary to make it cooperative with the couplermember 2, it is only then necesessary to apply the auxiliary lockstructure in the manner abovedescribed, and after that the key 8 can beinserted in the auxiliary lock casing to turn the cylinder sections 5-41and thus rotate the key K to throw Since the lock has previously beenattached on the outside of the door and fastened by means on the insideof the door. it will be seen that the auxiliary lock cannot be removed,and the door cannot be unlocked until the proper key 8 is applied.

The fastening bolt 15 in passing through the slot of the keyhole ispreferably fiattened throughout its length, so that it may be givenwidth sufiicient to have the required strength to hold the auxiliarylock in place, still by being flattened it may be passed through, theslot and over the usual lug obstruction provided to prevent use of keysother than the one specially prepared for the lock. The threads willappear only on the two widest portions of the bolt.

It will be understood that the regular key being held in the regularlock, can be used from the inside of the room to throw the regular lockbolt, and serve as a common night latch.

I claim:

1. The combination of a lock having a key, and a supplementary lock withmeans to engage and turn the said key to throw or withdraw the bolt ofthe lock and having means .for attaching said supplementary lock and atthe same time preventing the withdrawal of the key from its lock.

2. The combination of a lock having a key, and a supplementary lock withmeans to engage and turn the said key to throw or withdraw the bolt ofthe lock and having means for preventing the withdrawal of the key fromits look but not interfering with the turning of the key to control thebolt.

The combination of a lock having a key, and a supplementary lock withmeans to engage and turn the said key to throw or withdraw the bolt ofthe lock, said supplementary lock attachable to the lock carryingTtrpcture on the side opposite to the usual 4. The combination of a lockhaving a key, and a supplementary lock with means to engage and turn thesaid key to throw or withdraw the bolt of the lock, said supplementarylock attachable to the lock earrying structure on the side opposite tothe .usual lock and without in anywise mutilating the structure, or thelock parts.

5. Locking mechanism comprising a lock with a bolt and provided with akey hole, a key to throw or withdraw the bolt, an auxiliary means toactuate the key from the opposite side of the mechanism, and means forattaching said auxiliary through said keyhole so as to prevent thewithdrawal of said key.

6. An auxiliary lock attachable to a door comprising a tumbler-bolt lockwith keyholes, having means to actuate the key of the bolt lock from theouter side of the door, and means for attaching said auxiliary throughthe keyhole of said bolt lock.

7. An auxiliary lock attachable to a door having a tumbler-bolt keylock, and provided with a through keyhole, means to actuate the key ofthe bolt lock from the outer side of the door and means for preventinghaving a tumbler-bolt lock with keyholes and having means to actuate themaster key of the bolt look from the outer side of the door and afastening member adapted to pass through the keyholes of the tumblerbolt lock for removably securing the auxiliary lock in place.

having a tumbler bolt lock, and having means to actuate the master keyof the bolt from the outer side of the door and means for removablysecuring the auxiliary lock in place and which means is insertiblethrough the key hole of the door and lock organization.

10. An auxiliary look attachable to a door having a tumbler-bolt lock,comprising a barrel,a set of cylinder sections coaxially arrangedtherein, a casing inclosing the barrel, means for locking the casing andbarrel againstrotation, and a coupler engageable with the usual key ofthe lock to actuate the same, said sections forming a combination setfor a supplementary key by which said member may be actuated.

11. An auxiliary lock attachable to a door having a tumbler bolt lock,comprising a barrel, a set of cylinder sections coaxially rel, means forlocking the casing and barrel against rotation, and a coupler engageablewith the usual key of the lock to actuate the same, said sectionsforming a combination set for a supplementary key by which said membermay be actuated and a threaded stem projecting from one side of thedevice and adapted to be passed 'into the keyhole in the door and havinga clamp element to secure the Whole in Jlace on the door.

In testimon whereof I J SEPH F. GUNDERSON.

allix my signature.

arranged therenu a casing inclosingqthe bar 9. An auxiliary lockattachable to a door

